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GMOS

Gemini North Gemini SouthOptical
Last Modified: 
Thursday, January 14, 2021 - 14:27

The two Gemini Multi-Object Spectrographs (GMOS), one on each telescope, provide 0.36-1.03 µm long-slit and multi-slit spectroscopy and imaging over a 5.5 square arcminute field of view. Each GMOS is also equipped with an Integral Field Unit (IFU) making it possible to obtain spectra from a 35 square arcsecond area with a sampling of 0.2 arcseconds. The Nod-and-Shuffle mode, which enables superior sky subtraction, is available with both GMOS-N and GMOS-S in most spectroscopic modes.

Available For Proposals at Gemini North
For more details, see the schedules and the CfPs.
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Available For Proposals at Gemini South
For more details, see the schedules and the CfPs.
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Current Instruments

  • Altair
  • IGRINS
  • NIRI
  • GNIRS
  • NIFS
  • GMOS
    • Capability
    • Components
    • Proposal preparation
    • Calibrations
    • Observation preparation
    • Exposure Time Estimation
    • Data Reduction
    • Documents
  • GeMS
  • Flamingos 2
  • GSAOI
  • GPI
  • `Alopeke & Zorro
  • GRACES
  • MAROON-X

Pages

  • Capability
  • Components
  • Proposal preparation
  • Calibrations
  • Observation preparation
  • Exposure Time Estimation
  • Data Reduction
  • Documents

Capability Summary

  • Total wavelength range = 360−1030 nm

Imaging 

  • 5.5’ square field of view
  • 0.0807"/pixel spatial sampling
  • broad and narrow band filters

Spectroscopy

  • Resolutions 
    • 1260−8800 for 0.25" slit (depending on grating)
    • 210−1460 for 1.5" slit (depending on grating)
  • Modes
    • Single Longslit 
      • Slit length of 5.5’
    • Multi-Object Spectroscopy
      • Using 5.5’ square masks
    • Integral Field Unit (IFU), fiber fed, 0.2" sampling
      • IFU-2, 7" x 5", 1000 spaxels
      • IFU-R, 3.5" x 5", 500 spaxels

Guiding Options

  • GMOS OIWFS
  • PWFS2

Get the sensitivity
 

The GMOS were built by a collaboration of the Astronomy Technology Centre at the ROE, the University of Durham in the UK and the Herzberg Institute of Astrophysics in Canada. GMOS-N was delivered in July 2001 with GMOS-S following in December 2002.

GMOS Mechanism

Instrument Team

Instrument Scientist GN

Julia Scharwächter

Additional Support Staff
    • Kristin Chiboucas
    • Jason Chu
    • Teo Močnik

Email: GMOS_N_science@gemini.edu


Instrument Scientist GS

German Gimeno

Additional Support Staff
    • Veronica Firpo
    • Hwihyun Kim

Email: GMOS_S_science@gemini.edu

Gemini Observatory Participants

The Gemini Observatory provides the astronomical communities in six participant countries with state-of-the-art astronomical facilities that allocate observing time in proportion to each country's contribution. In addition to financial support, each country also contributes significant scientific and technical resources. The national research agencies that form the Gemini partnership include: the US National Science Foundation (NSF), the Canadian National Research Council (NRC), the Chilean Comisión Nacional de Investigación Cientifica y Tecnológica (CONICYT), the Brazilian Ministério da Ciência, Tecnologia e Inovação, the Argentinean Ministerio de Ciencia, Tecnología e Innovación, and the Korea Astronomy and Space Institute (KASI). The observatory is managed by the Association of Universities for Research in Astronomy, Inc. (AURA) under a cooperative agreement with the NSF. The NSF also serves as the executive agency for the international partnership.


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    • Start here!
    • Phase I
    • Phase II
    • Phase III
    • Helpdesk
    • Schedules and Queue
    • Resources
    • Telescopes and Sites
    • Visiting Gemini
    • Operations Development

Instrumentation

    • Current Instruments
    • Future Instruments
    • Visiting Instrument Program
    • Instrument Upgrade Program
    • Retired Instruments
    • Performance Monitoring

About

    • Annual Reports and Program Plans of the Gemini Observatory
    • Careers and Jobs
    • Contact Us
    • Gemini For Scientists
    • Gemini Telescopes, Science and Technologies
    • Governance
    • Jobs
    • Participant Shares
    • Web Accessibility
    • Gemini In The Era of Multi-Messenger Astronomy

Gallery

    • Images
    • Videos
    • CloudCam

News

    • Press Releases
    • Web Features
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    • News Archive

Learn

    • Virtual tour
    • Live From Gemini
    • AstroDay Chile
    • Family Astro
    • Galileoscope
    • Journey Through The Universe
    • Viaje Al Universo
    • Mapa Estelar
    • StarLab
    • El Planetario Móvil
    • Facility Tours
    • Visitas al telescopio
    • Publications
    • Library
    • Galileoscopio
    • Gemini Card Game

Events

    • Gemini at National Meetings
    • 2009 Mentoring Conference at ‘Imiloa Astronomy Center - Hilo, Hawaii
    • Society of Women Engineers Conference - Long Beach 2009
    • Women in Astronomy and Space Science Conference 2009